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In order to evaluate the possibility of application of contrast-enhanced MRI for imaging of the lipid metabolism in myocardium we carried out the synthesis of the Mn-DTPA conjugated with phenyl-pentadecanoic acid (Mn-DTPA-PPDA) and tested the ability of the complex to change the T1-weighted spin-echo images of the myocardium in rabbits. Low-field (0,2 T) scanner was employed for the imaging studies. The Mn-DTPA-PPDA complex demonstrated significant increase in intensity of the T1-weighted spin-echo images both in phantom experiments and of the myocardium in rabbits starting from the 17-th minute after intravenous injection of the complex. No toxic effects were detected with the doses of the Mn-DTPA-PPDA employed in the study. Hence the complex Mn-DTPA-PPDA is worth further studies as possible clinical paramagnetic marker of myocardial lipid metabolism.
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